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Deposits - Schedule of Maturities of Certificates of Deposit (Detail) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Banking and Thrift [Abstract]    
2020 $ 715,061  
2021 103,285  
2022 42,891  
2023 8,215  
2024 1,264  
2025 88  
Total $ 870,804 $ 757,038